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2. Signal and Noise Characteristics of Thin Film Media Estimated by Magnetic Force Microscopy

Author

Honda, Yukio, Hirayama, Yoshiyuki, Inaba, Nobuyuki, Ito, Kenya, and Futamoto, Masaaki

Subjects
Magnetism -- Research, Thin films -- Magnetic properties, Microscope and microscopy -- Research, Business, Electronics, Electronics and electrical industries
Abstract

An analytical magnetic force microscopy has been applied to investigate the relationship between the media SIN and the microscopic magnetization irregularities of CoCr-alloy longitudinal and single-layer perpendicular media recorded at linear densities up to 450 kFCI. When the SIN is compared between longitudinal and perpendicular media, a 16-nm-thick CoCrPt longitudinal medium shows a little higher S/N than that of a heat-treated 25-nm-thick CoCrTa perpendicular medium. The medium S/N is found to deteriorate with increasing the size and the number of magnetization transition irregularity. Index terms--magnetic force microscopy, thin film media

Published
1999

10. Tb3+-enhanced Potentiometric Detection of Single Nucleotide Polymorphism by Field Effect Transistors.

Author

Jinping Wang, Ito, Kenya, Nakanishi, Takuya, Kuroiwa, Shigeki, and Osaka, Tetsuya

Subjects
FIELD-effect transistors, TRANSISTORS, TERBIUM, NUCLEOTIDES, DNA
Abstract

The use of Tb3+ as a center ion and media to introduce more exogenously negative charges onto double-stranded DNA (dsDNA), can greatly enhance potentiometric signals produced by the shift of gate voltage of field effect transisitor (FET). Furthermore, different affinities of Tb3+ to normal and mismatched dsDNAs amplified the signal difference between their detections, which can improve the discrimination of single nucleotide polymorphism. [ABSTRACT FROM AUTHOR]

Published
2009
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